Unsaturated polycyclic sulfites and a process for their manufacture



United States Patent and their derivatives containing two hydrogen atoms in 5.6-position, inwhi'ch X representshydrogen, halogen or alkyl and Y representshydrogen or alkyl.

The new compounds can be obtained by reacting diols of the general formula:

or their derivative containingtwo hydro enflatoms' in ".6' position, in which X and Y have the'ine'anin'gs' given above, with thionylchloride, if desired in the presence of an indifferent solvent. Chlorine derivatives of the unsaturated diolsare preferably used for this purpose;

As indifferent solvents there are suitably used, for example, CHzCl, CHCli or CCl4, benzene, toluene-xylene and petroleum ether. The reaction may be performed while .cooling' or ata raised temperature with or without the addition'of an agent capablefo'f binding hydrochloric acid.

The diols required for the reaction can be obtained by reacting an ester of an unsaturated dialcohol with a halogenated dienev of the cyclopentadiene type, preferably hexachlor'ocyclopentadiene, at a raisedv temperature and,- if desired, with application of pressure; the addition product so obtained is then transformed into the corresponding free alcohol, for example, by re-esterification in an alcoholic solution in'the presenceo'f a substance serving as a catalyst, for example, amineral acid. The Diels- Aldersynthesis may be performed by using a solvent, for example, benzene and its homologues or the corresponding chlorineand nitro-der'ivatives of chlorinated hydrocarbons, for example, methylene chloride, chloroform or carbon tetrachloride, or alcohol,ether or ketones.

Thus, for example, hexachlorobicyclo- 2 2: 1 l-heptene- (2) bis-hydroxymethylene-(5:6) can be treatedwith thionyi chloride to obtain the 's'ulfit'e of hexachlorobicycle- [2 2': 1 .-hepten'e- (2) -bis-liydroxymethylene'- (5 6)- in the form of a mixture of isomers from 'which' .the pure lCe 2 be isolated from a solution inpetroleum ether by frac tional crystallization.

The homologues, i. e. for example the pentachloroand tetrachlo'ro-derivatives and the correspondingv analogues of methyl and ethyl can 'beobtained in a corresponding manner.

As- Diels-Alder-components suitable for the manufacture of sulfites of the-kind described above, there come also into consideration the halogenated alkyl derivatives, for example, dimethylcyclopentadiene.

The polycyclic halogenated sulfites are readily crystal lizing colorless compounds;

The products of this invention may be used for protecting Wood, paper, textiles and'leather and-as intermediates for the manufacture of drugs. In thepure state, they are practically odourlessand are, therefore, especially suitable for the mentioned purposes. Theyhave a curative and prophylactic effect and are preferably used, if desired in admixture with other insecticides, ovicides, fungicides, herbicides or fertilizers, for combating animal and fung'oid pests.

In addition'to their excellent action as pesticides the substances here'inbe'fore described are distinguished by their chemical stability.

The products of this invention have a lethal action on insects-of the various classes andkinds in every state of development, for example, on'imagines; larvae and eggs of, for example, beetles, butterflies, flies, grasshoppers, cockroaches, bugs and lice of plants and animals. The

most important fields of application of the products of this invention are plantprotection; 'stockprotection'andthe sorcalled hygienic pest control;

1 A-sp'raying: preparation composed hexachlorobicyclo [222:1] heptene -'(2) bis hydroxymethylene-(5:6)-sultite, 70 percent of 'dipentene'and' 10 percent of oxyethylated alkyl phenol can successfully be used for combating fungoid pests, especially genuinemib;

dew. A preparation of 0.5 percent strength" timely sprayed on the plantscompletely avoids the attack of the mildew on plants. a

The lethal action or a preparation of the above constitution on diphterene larvae *can' be demonstrated in the following manner:

, Hexachlorobicyclo [2-:2:ll-heptene-(2).-bis-hydroxymethylene-(5 6) -sulfite is intimately? mixed" with cottage cheese and young: larvae of doinestie flies (Mu-sea domestica) are then placed on the poisoned food. A- toxicity of, for example, 0.012-5' percent sufiices already to kill all the larvae within 1 to 3 days. H

Commonbed-bugs (Cimex leetula'rius) are killed-within a few hours when sprayed with an-aqueous' emulsion of 0.01 percent strength of a preparationcomposed of 15 percent of -hexachloro-bicyclo-[ZzZa1 Zl-hepteiie-(2)- bis-hydrOXymethylene-(S:6)-si1lfite,: percent of dioxane and 10 percent of oxyethylated alkyl phenol as eniul sifier.

An emulsion of 0.05 percent strength of a spraying preparation composed of 15 percent of-hexachlorobicyclo- [2:2: 1] heptene (2) bis hydroxymethylene (5:6) sulfite, 75 percent of' eyclohexanone andloper'ce'nt of oxyethylat'ed alkyl phenol when'sprayed or dusted has? a rapid action on caterpillars, for example, of the brawn tail moth.(E upro'ctis chrysoirhoe'a). They are '-rapidlys'e'riouslyin'jured' and'die after 1 2' days;

An emulsifiable'spraying preparation composedqof 15 percent of hexac hlorobicyclo- [2: 2: l 'heptene- (2 bis-by droxymethylene-(S:6)-sulfite, 75 percent of dioxane-and 10 percent of oxyethylated alkyl phenol when appliedin a concentration of 0.015 percent, brings about the'complete destruction of aphids (Aphidae), for example, on Cinerariae or' Chrysanthemums; p v g 7 An emulsifiable spraying preparation composed of 15* Patented July 16, 1957 of 20 percent of percent of hexachlorobicyclo: [2:2: 1]-heptene-(2)-bishydroxymethylene-(S :6)-sulfite, 75 percent of dioxane and 10 percent of oxyethylated alkyl phenol is useful for the destructionof caterpillars, for example, Lz'inantria dispai'.

When this spraying preparation is applied in the form of an aqueous emulsion of 0.1 percent strength, the insects that come in contact with the sprayed emulsion are rapidly paralyzed and die within a few hours.

Migratory locusts are killed when sprayed with an emulsion of 0.1 percent strength of a preparation composed of 15 percent of hexachlorobicyclo-[2:2:ll-heptene-(2)-bis-hydroxymethylene-(5:6)-sulfite, 75 percent of dioxane and 10 percent of a wetting agent as emulsifier.

The substances may be used in the form of a dust or a spray and may be used in admixture with a substance, for example, a diluent or a solvent, a wetting, emulsifying or adhering agent.

A wettable powder composed of 25 percent of hexachlorobicyclo [2:2z1] heptadiene (2:5) bis hydroxyethylene (5:6) sulfite, percent of cell pitch, 0.25 percent of oxyethylated alkyl phenol and 64.75 percent of chalk, when sprayed on apple trees in a concentration of 0.1 percent has a prophylactic action against the caterpillars of the brown tail moth (Euproctis chrysorrhoea) and other kinds of caterpillars leaving the windownest by killing them before considerable devouring damage on the trees occurs.

A dusting preparation composed of 1 percent of hexachlorobicyclo [2:2:1] heptadiene (2:5) bis hydroxyethylene (5:6) sulfite and 99 percent of talc, when applied to corn in a proportion of 1 kilogram to 1000 kilograms of corn, is very useful for combating grain weevils and other stock pests.

An emulsifying product containing percent of hexachlorobicyclo-[2:2:1] heptadiene (2:5) bis bydroxyethylene (5 :6) sulfite, when sprayed on cinerariae in a concentration of 0.1 to 0.05 percent, has a rapid and lethal action on sucking pests, for example, green aphids.

The following examples serve to illustrate the invention but they are not intended to limit it thereto.

EXAMPLE 1 Hexac'hlorobicyclo [2:2:1] heptadiene (2:5 bis hydroxyethylene (5:6) sulfite 77.2 grams of hexachlorobicyclo-[2:2:ll-heptadiene- (2:5 )-bis-hydroxyethylene-(5 :6) are mixed in the cold with an excess of thionylchloride. A vigorous reaction sets in and is completed by heating on the steam bath. The thionylchloride in excess is destroyed by pouring it into water and the resulting sulfite which solidifies after some time is isolated by filtering with suction. The reaction product obtained in the form of a mixture of isomers melts at 93 95 C.

Analysis.Calculated for C11HsO3CleS: O: 11.05; S: 7.39. Found: molecular Weight: 432.9; 0: 10.73; S: 7.29.

EXAMPLE 2 Hexachlorobicyclo [2:2:1] heptene (2) bis hydroxyethylene (5:6) sulfite 71.6 grams of hexachlorobicyclo-[2z2z1]-heptene-(2)- bis-hydroxymethylene-(5z6) are treated with an excess of thionyl chloride. In order to complete the reaction, it is advisable to reflux the reaction mixture for about 1 to 2 hours. When the evolution of hydrochloric acid is complete, the thionyl chloride in excess is destroyed by pouring itinto water and the sulfite so obtained, which solidifies after some time, is isolated by filtering with suction. The reaction product so obtained can be purified by distillation under highly reduced pressure (boiling point: l64-168 C. under a pressure of 0.7 mm. of mercury; the product so purified has a melting range from between about 90-100 C.

The product so obtained is'a mixture of isomers and 4 substantially contains 2 isomers boiling at 108110 C. and 208-2l0 C. The isomers may be separated from one another by fractional crystallization from a solution in petroleum ether.

Analysis.Calculated for CeHeOsClsS: C: 26.56; H: 1.48; O: 11.80; Cl: 52.28; S: 7.88; molecular weight: 406.92. Found: ,C: 26.36; H? 1.28; O: 11.74; Cl: 52.46; S: 7.84.

The analytical values found correspond in both cases to the theoretical values; the molecular weight determination likewise shows no differences.

EXAMPLE 3 Hexachlorobicyclo [22:1] heptene (2) bis hydroxyethyler ze (5:6) sulfite 71.6 grams of finely powdered hexachlorobicyclo- [2 2: l -heptene- 2) -bis-hydroxymethylene-(5 :6). are suspended in 300 grams of carbon tetrachloride and the calculated amount of thionyl chloride is added at room temperature, while stirring. To accelerate the reaction, the reaction mixture is gradually heated to the boiling temperature of the solvent. When the evolution of hydro chloric acid is complete, the solution is cooled, stirred with water and subsequently treated with an aqueous solution of sodium bicarbonate until the reaction solution is neutral.

After drying and distillation of the solvent, the reaction product is obtained in the form of a fused mass which soon solidifies. It is then worked up as described in Example 2.

EXAMPLE 4 tone-(2)-bis-hydroxymethylene-(5:6) (obtained from pentachlorobicyclo [2:2: 1] heptence-(2)-bis-acetoxymethylcue-(5:6) boiling at l96198 C. under a pressure of 2.2 mm. of mercury by re-esterification in alcohol) is treated with thionyl chloride. The product so obtained boils at l181 C. under a pressure of 2.6 mm. of mercury.

Calculated for CaHqOsClsS: molecular Weight: 372.49; Cl: 47,59; S: 8.61. Found Cl: 47.75 and 47.81; S: 8.43 and 8.32.

EXAMPLE 5 Tetrachlorobicyclo [2:2zl] heptene-(2)-bis-hydroxymethylene-( 5:6) (obtainable from tetrachlorobicyclo- [2:2:1]-heptene (2) bis-acetoxymethylene-( 5:6) boiling at l-188 C. under a pressure of 2.2 mm. of mercury) is reacted with thionyl chloride. Tetrachlorobicyclo- [2:2:l] heptene (2) bis hydroxymethylene-(5z6)-sulfite is obtained. Boiling point: -l72 C. under a pressure of 3.0 mm. of mercury.

We claim:

1. A member of the group consisting of compounds of the general formula:

in which X represents a member of the group consisting of hydrogen and chlorine, at least 4 chlorine atoms being present, and Y represents a member of the group consisting of hydrogen and methyl and their derivatives containing two hydrogen atoms in 5,6-position.

2. Hexachlorobicyclo [2:2z1] heptadiene-(2:5)-bis'- CHs in the form of a mixture of isomers.

3. Hexachlorobicyclo [2:2z1] heptene (2) bis hy droxymethylene-(S:6)-sulfite in the form of a mixture of isomers.

4. Hexachlorobicyclo [2:2z1] heptene (2)-bis-hydroxymethylene-(S:6)-sulfite melting at 108 110 C.

5. Hexachlorobicyclo [2:2z1] heptene (2) bis hydroxymethy1ene-(5z6) sulfite melting at 208-210 C.

6. A process for the manufacture of new compounds defined according to claim 1, wherein a member of the group consisting of diols of the general formula:

Y all-OH l X- -X X CH-OH in which X represents a member of the group consisting of hydrogen and chlorine, at least 4 chlorine atoms being present, and Y represents a member of the group consisting of hydrogen and methyl and their derivatives containing two hydrogen atoms in 5,6-position, are reacted with thionyl chloride.

7. A process as claimed in claim 6, wherein the reaction is carried out while heating.

8. A process as claimed in claim 6, wherein chlorinated unsaturated diols are used as starting material.

9. A process as claimed in claim 6, wherein the reaction is carried out in the presence of an inert solvent.

References Cited in the file of this patent UNITED STATES PATENTS 2,465,915 Myles Mar. 29, 1949 2,708,198 Pietsch May 10, 1955 2,708,200 Pietsch May 10, 1955 

1. A MEMBER OF THE GROUP CONSISTING OF COMPOUNDS OF THE GENERAL FORMULA: 